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20121002
20121002
Search Results 0 to 6 of about 7 (some duplicates have been removed)
is in decline. researchers at the australian institute of marine science say the reef has lost half of its coral cover over the past 27 years. there are multiple causes, including a destructive kind of starfish shown here. we look at what's behind it and what's at stake-- in australia and around the world-- with nancy knowlton, a coral reef biologist and a chair of marine science at the smithsonian national museum of natural history here in washington. welcome. >> thanks. how has all of this coral died off? do we know what's causing it? is it all that... >> it's not all the star fish. the star fish is about 42%. typhoons, big strong storms another 48% and then coral bleaching is the remaining 10% which is caused whenever the water gets too hot. >> ifill: so this is human causedded? >> yes. most of it is human caused. i mean a coral reef naturally goes through cycles of up and down. but it shouldn't be declining by half over course of 27 years. >> ifill: i feel like we have talked before about the declining coral cover. but not... but i'm wondering whether it's now picking up speed or whether thi
-based international academy of television, art, and sciences oversees the awards. its members include about 500 media and entertainment companies. >>> for an update on the weather forecast, here's mai shoji. mai? >>> indeed, it is the typhoon season, but one after another we have storms coming in. we have a couple of storms to talk about. let's start off with this one. this is the tropical storm maliksi. it is moving towards the islands. throughout the day tomorrow, the islands will be affected due to this storm and it will be intensifying into a secure tropical storm status by wednesday evening. from the afternoon, actually, it will be around this region, so it will be quickly moving away. maliksi is a fast-moving system. it will be picking up its pace tomorrow. but the ting that this will be doing is it will be enhancing the stationary boundary, which is just south of the eastern coast of the toho ka region. due to that earn jized stationary front, thunderstorms will be affecting the eastern region especially and some heavy down tour pours to be looking out for. another storm is the kami over the s
of marine science says the pace of damages kicking up. cyclones of predatory starfish are the main causes along with: gas shipments and global warming. >> coral reefs provide the breeding ground for countless species of fish. the great barrier reef is no exception. commercial fishing is now mostly banned across much of the area. three 6 cents more than 2,600 kilometers along the us trillion coast. the northern part of the refinements largely intact. it is the southern part scientists are worried about. severe storms are said to have cost nearly 50 percent -- said to have caused nearly 50% of the damage. a further 40% was caused by starfish that feed on the coral. one species, the crown of thorns, has proven especially deadly for the coral cover. >> we believe if we can take action on one of the things we can directly control, the crown of thorns starfish, it may leave the reef in a position where it can better withstand some of the climatic impact spite cyclone and coral bleaching. >> regardless of what is causing the damage, brain biologists say action needs to be taken now to save the r
. there is some corals that live for many thousands of yeernz we found through some of the science we do we can drill holes down to the center of the corals and look at annual growth rings and we can look at when, in fact, when the first agriculture in australia happened, we saw a change in the type of chemistry that the annual growth rings and coral were depositing. so we have seen a chronology of increased siltation, of increased fertilization, of
Search Results 0 to 6 of about 7 (some duplicates have been removed)